Aerogel type rare earth composite thermal insulation material and preparation method thereof

Abstract

The invention discloses an aerogel type rare earth composite thermal insulation material and a preparation method thereof. In the preparation process of the rare earth composite thermal insulation material, the processes of surface chemical modification, encapsulation modification, power physical and chemical reaction and the like are adopted; a large number of closed vacuum-like micropores are generated in the product, the porosity is increased, and the heat insulation performance of the compounded new material is greatly improved due to the blocking effect of the hollow microspheres on radiation heat transfer and the efficient heat insulation function of aerogel; under the combined action of an additive and an adhesive, especially the good high-temperature bonding property of a rare-earth inorganic high-temperature adhesive, a gas phase, a solid phase, a granular material and a fiber material are organically bonded together to form a layered reticular force-superposed unit and a filling structure, so that the whole thermal insulation material has a very strong framework force and affinity, good structural strength and long service life; moreover, the material does not contain asbestos, dust is not generated during the construction process, and the excess material can be recycled, so that the material is a green and environment-friendly product.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to an airgel type rare earth composite thermal insulation material and a preparation method thereof. Background technique [0002] Thermal insulation technology is the most economical and most effective measure for energy saving and consumption reduction. Research and development of new thermal insulation materials is an important topic for energy saving and consumption reduction. The current industrial thermal insulation is still dominated by inorganic fiber materials such as traditional rock wool, glass wool and aluminum silicate fiber. These materials are cheap, but most of them have poor thermal insulation performance, high water absorption, and poor thermal stability for long-term use. Ash sinking, seam cracking and other problems, serious heat loss, can not meet the specified requirements. In particular, special-shaped parts such as steam turbines, heat p...

AI Technical Summary

Problems solved by technology

The current industrial thermal insulation is still dominated by inorganic fiber materials such as traditional rock wool, glass wool and aluminum silicate fiber. These materials are cheap, but most of them have poor thermal insulation performance, high water absorption, and poor thermal stability for long-term use. Problems such as ash sinking, seam cracking, etc., serious heat loss, fail to meet the specified requirements

In particular, special-shaped parts such as steam turbines, heat pumps, valves, elbows, three-way (four-way) and spheres are more likely to be damaged and water ingress, resulting in failure of insulation, requiring regular maintenance and replacement

[0003] In recent years, new thermal insulation materials such as nanoporous airgel felt have appeared. These materials have excellent thermal insulation performance, but most of them are used in combination with fiber materials. The disadvantages of fiber materials still exist, and airgel also has poor strength and high price. , serious pollution in the production process and other weaknesses, so there are certain restrictions on its popularization and application